Hydraulic shaping pipe column and casing pipe shaping process

Abstract

The invention relates to the technical field of shaping repair of damaged casing pipes, in particular to a hydraulic shaping pipe column and a casing pipe shaping process. The hydraulic shaping pipe column comprises an oil pipe, a shaper and a hydraulic booster, wherein the hydraulic booster comprises a two-way booster and a hydraulic commutator; the two-way booster comprises a piston cylinder anda piston; the piston and the piston cylinder are matched to form a shaping chamber and a lifting chamber; the hydraulic commutator comprises a commutator main body; a center hole of the commutator main body is internally provided with a pressure sensing line in a sliding seal and upward anti-slip manner; the pressure sensing line is provided with a liquid feeding channel; the commutator main bodyis internally provided with a shaping channel and a lifting channel; the pressure sensing line has an upper limit and a lower limit in the stroke of up-down reciprocating motion along with the oil pipe; at the lower limit, an inlet of the shaping channel is communicated with an outlet of the liquid feeding channel; an inlet of the lifting channel is communicated with a pressure relief channel; and at the upper limit, the inlet of the shaping channel is communicated with the pressure relief channel, and the inlet of the lifting channel is communicated with an outlet of the liquid feeding channel.

Description

technical field [0001] The invention relates to the technical field of shaping and repairing damaged casings, in particular to a hydraulic shaping pipe string and a casing shaping process. Background technique [0002] With the increase of the oilfield development period, coupled with well structure, cementing quality, corrosion and other reasons, the well conditions of oil and water wells are getting worse day by day, and the number of wells with casing damage is also increasing, resulting in a large number of oil and water wells lying in wells. It cannot be implemented, the conflict between layers is intensified, and the output drops. [0003] For this reason, the Chinese invention patent with the authorized notification number CN101942979B discloses an anchor ball type casing shaping device and a casing shaping method thereof. assembly, anchor assembly, hydraulic cylinder assembly, lower joint, and the ball shaper connected to the lower joint. When in use, the anchor ass...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydraulic shaping pipe string to solve the technical problem in the prior art that the pipe string is easily stuck and unable to be lifted up; it also provides a casing shaping process to solve the problem that the pipe string cannot be lifted up due to being stuck. technical issues

Images